ambos



3 Sheets-Sheet 1.

(No'Model.)

H. P. AMBOS.

VALVE GEAR.

Patented Apr. 29.1884.

...nf/ k.

NV PETERS. PhaIu-lhhygmphar. Washingmn. CIV C.

(No Model.) 4 s sheetssheet 2. H. P. AMBOS.

VALVE GEAR. No. 297,656. Patented Apr. y:29, 1884.

(No Model.) 3 Sheets-Sheet 3.

H. P. AMBOS.

l VALVE GEAR. Y

No. 297,656. Patented Apr. 29, 1884.

Wdzesses: [7N/anfang j. ffy/MJ ZM ZM "UNITE-D VSTATES PATENT rines.

HERMAN F. AMBOS, OF COLUMBUS, OHIO, ASSIGNOR TO THE COLUMBUS i MACHINE COMPANY, OF SAME PLACE.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 297,656, dated April 29, 1,884.'

Application filed January 7, 1884.

To all whom t may concern Be it known that I, HERMANE. AMBOS, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented anew and useful Valve- Gear, of which the following, in connection with the annexed drawings and letters of reference thereon, is a specification.

My invention relates to certain improvements in the mechanism by which the puppetvalve or other valves of a steam-engine are operated; and the objects of'my invention are, first, to produce a very quick and sure movement for opening and closing such valve or valves, and, second, to make the said movement adjustable and adaptable for a variable cut-off, and thus operatingl the steam-engine with more or less expansion. I attain these objects by the mechanism illustrated in the accompanying drawings, in which' Figure I is a view, partly in elevation and partly in section, of my invention as applied to steam-chests of puppet-valves. Fig. 2 is a` detail view of the adjustable portion of my valve-motion. Fig. 3 is a central transverse section through the regulating or adjusting nut and screw of the same. Fig. 4. is a front elevation of the mechanism shown in Fig. 2. Fig. 5 is a top view of the mechanism shown in Fig. I. Fig. 6 is a linear diagram of my invention, illustrating the position of the several main constituent parts of the mechanism when the main eccentric stands at its greatest altitude, which eccentric is not shown. Fig. 7 is a similar diagram answering to the middle position of the main eccentric. Fig. 8 is a similar diagram answering to the reversed position of the eccentric as seen in Fig. 6. Fig.V

. 9 is a rear view of my valve-motion, the steamchests, valves, and valve-rods being omitted.

A in the drawings represents a portion of the main frame of my machine, to which the whole mechanism is suitably attached. B represents a steam chest containing the main valves. C represents the main shaft, and D D D2 eccentrics.

The steam-engine to which I have applied my invention being of ordinary construction, I have omitted in the drawings the steam-cyl- 5o inder, exhaust-valves, piston, piston-rod, con- -of a crank, I.

(No model.)

necting-rod, and other parts not strictly necessary to illustrate the same.

The eccentric Dis, by means of a longitudinally-adjustable eccentric-rod, d, connected with a horizontal shaft, E, which is hung between the swinging arms e, pivoted at e to one of the steam-chests B, or to any suitable portion of the frame A. The shaft E is provided with a disk, e?, to which, at two diametrically-pposite points, wrist-pins e* e4 are fastened. A lo ngitudinally-adjustable connecting-rod, f, connects the wrist-pin e3 with a pin,

, on acircularly-moving slide, f2. The slide f2 is fitted upon a curved arm, F, of a sleeve,

f3, which is fitted to shaft G, hung by means of two brackets, g, to the frame A. This slide f2 has a slotted head, ft, with a pin, f5, to which the cross-headfG of a screw, fl, is pivoted. The sleeve f3 is provided with a slotted head, f8, to which a swiveledlbearing, H, ishung by means of trunnions h, formed thereon. Through this bearing H a cylindrical nut, h', is passed, having a shoulder, h2, on one side, and a burr or nut, h3, on the other side ofthe bearing, (see Fig. 2,) so sas toprevent longitudinal displacement. upon the screw f7, and is provided with a hand-Wheel, h4, which, when turned, will move the screw]E7 and the slide f2 either one way or the other-that is, either backward yor forward-thereby changing the position of the pin f. The sleeve f is provided with a horizontal crank-arm, F,and wrist-pin f, by means of which. a longitudinally-adjustable eccentric-rod, d', is connected with the eccentric D'. A longitudinally adjustable connecting-rod, I, connects the wristpin e4 of the disk E with the wrist-pin z of an arm, i', An arm, i2, of the crank I transfers its motion by means of a wrist-pin, i3, and a longitudinally-adjustable connectving-rod, I2, to a crank-pin, lo, on the upper arm, k', of a lever, K,which lever is'suitably pivoted at 7a2 to a steam-chest coupling, B', or to any suitable portion of the frame A. On the lower arm, 7c3, of the said lever K a wrist-pin, 7a4, is provided, which, by means of a longitudinallyadjustable connecting-rod,

This nut h is iitted" h5, is connected with a wrist-pin, Z, of an arm,

IOO

L is pivoted at Z2 in a suitable manner to the steam-chest coupling B, and is provided with another arm, Z, having a tappet-head, 1*, at its end. The outer extreme surface, Z5, of the tappet-head is of circular form, and concentric with the fulcrum-pivot Z2, for reasons hereinafter stated. The tappet-head Z* moves in an oblong frame, m, of the valverod m, to which the steam-valve or steamvalvcs M of 011e of the steam-chests B are attached. A similar tappct-lever, L', is provided for the right-hand steam-chest B; but asV the motion of the valves here must be the reverse of the motion of the valves in the lefthand steam-chest, the longitudinally-adjustable connecting-rod I" connects the wrist-pins Zand 7a, as seen in Fig. l, and the -lever L stands in a position vertically opposite that of the lever L. Thus it will be seen that the valves M, operated by the levers L L, open and close at intervals, answering two diametricall opposite positions of the crank of the main shaft C or of the eceentrics D D Dl. As the levers L L oscillate, the tappet-heads Zmove alternately in and out of the frames n1 of the valve-rods ymf, and by moving into the frames they strike the inner surfaces of the same and open the valves with a very quick motion, which is due to the fact that the quickest-acting portion of the lever motion is made available for the operation of the valves, while the slowest-acting portion of the lever motion is not utilized for moving the valves, the tappetheads Z* swinging outside of the frames ym, and their surfaces Zf bearing against the forward inner surfaces of said frames, and thus preventing the valvesbecomingincidentallymoved.

By means of the mechanism interposed between the eccentrics D D andlever K the motion of the eccentric-rods (Z d is so modified that it becomes very rapid at the moment the valve is to be operated, inasmuch as then the wrist-pins c c* occupy such positions which will afford the greatest leverage for rapid motion of the connecting-rods I and I2, and thus I avoid the wire-drawing of steam when the valves begin to open.

\Vhen it is desired to cut off steam at an earlier stage than that at which the cutting oii'is found to take place, the slide f 2 is, by

means of the hand-screw h", as above stated, moved toward the end of the arm F, and the movement of the pin f is thereby increased and the stroke of the connecting-rods I I2 diminished, while the pin f asecnds or descends synchronously with the connecting-rod I, and

l consequently the Valves will be held open for a shorter period, and the steam-engine will work with more expansion. The reverse will be effected when the slide f 2 is moved toward the fulerum of the arm F.

The eccentric D?, eccentric-rod d2, and lever N are parts of the exhaust-valve motion, and will be understood by those skilled in the art without further explanation.

It is readily seen that the above-described mechanism may be adopted for operating slidevalves or oscillating valves of dat or conical construction. It is also evident that the said mechanism may be made an automatic cut-off by suitably connecting the slide f2 with the sliding collar of a pendulum or spring-weight governor.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

l. In a valve-motion for steam-engines, the combination of a stroke-Varying mechanism, comprising the adjustable slide and its connections, and a stroke-increasing mechanism, comprising the disk c2 and its connections, whereby a very quick and variable or adjustable valve-strokeis obtained, substantially as and for the purpose described.

2. The combination of the eccentric-rod d, operating the center shaft, E, of the disk e'l, the wrist-pins c c", connecting-rods f I, leverarm v', having a wrist-pin, i, and swinging arm F, having pin j", whereby a rapid motion for the valve is obtained, substantiallyas and for the purpose described.

3. The combination of theslide f2, theswinging arm F, having the adjusting device of the said slide attached to it, and the connectingrodsf and I, substantially as and for the purpose described.

4. The combination of the valves M, having frames m and valve -rods m', and the operatinglevers L L, having tappet-heads Z" ofthe construction shown, whereby only the greatest speed of the valve-motion is utilized, substantially as and for the purpose described.

5. The combination of the valve-rods m', having oblong frames m, and the tappet-levers L L', having concentric surfaces Z, whereby the valves M are kept in their closed position, substantially as and for the purpose described.

HERMAN F. AMBOS. fitnessesz M. T. REICHE, JOHN C. TAYLOR.

IOO 

